Ezio Melotti <[email protected]> added the comment:
This is a shorter snippet to reproduce the issue:
import os
os.environ['TEST'] = u'äö'.encode('iso-8859-1')
os.path.expandvars(u'%TEST%a')
If the var is a non-ASCII byte string, and the string passed to expandvars() is
Unicode, the var is decoded implicitly using the ASCII codec and the decoding
fails.
On Python 3 the situation looks even worse:
import os
os.environ['TEST'] = 'äö'.encode('iso-8859-1');
os.path.expandvars('%TEST%a')
This snippet returns "b'\\xe4\\xf6'a".
----------
priority: normal -> high
versions: +Python 2.7, Python 3.1, Python 3.2
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<http://bugs.python.org/issue6815>
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